Aluminum, btw
https://www.educate-yourself.org/cn/Aluminum-Toxicity-Is-Wel...
There’s also often mercury - https://www.cdc.gov/vaccinesafety/concerns/thimerosal/index....
I actually had a similar theory as to where egg allergies come from. Many vaccines have egg in them
https://www.cdc.gov/flu/prevent/how-fluvaccine-made.htm
https://www.fda.gov/vaccines-blood-biologics/safety-availabi...
Aluminum, btw
https://www.educate-yourself.org/cn/Aluminum-Toxicity-Is-Wel...